<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    img {
      width: 200px;
      height: 200px;
    }
  </style>
</head>
<body>
  <h1>请扫描二维码</h1>
  <img src="<%-code%>" alt="">
</body>
</html>